well that was a pendulum.
"great. A transfer student rival."
"oh, a childhood friend even. wonderful."
"oh? stuck up for Ai class against the snobby-ass Rura class? I mean...okay."
"getting really friendly with Akane's woman. Not smart, but, maybe she'll get out of it alive."
"....ah. yep. as I suspected, just a full-on jealous & possessive monkey wrench in the works."
And I suspect this means "Haru-chan" will get all monopolizing of Hosho, who won't notice what's happening, and Nanase will get pushed out more and more - and might actually step back on her own, thinking she misread things where Hosho was concerned, possibly "helped" along by Haru having a 1-on-1 chat with Nanase about where Hosho stands (a lie).
And that might mean Prez steps up and shoots her shot, and Nanase starts hanging out with her (not out of accepting a confession, but just a kindred spirit, who might help her mend her reputation, even) - and Hosho will see that, and misread the already fucked up misread, and thus the drama will escalate, potentially also involving exacerbating tensions between Rura & Ai classes heading toward the festival.
Or I could be wrong and either Hosho or(and) Nanase will realize what's going on with Haru and head it off at the pass and set our latest addition straight about how she's not getting Hosho at the end. But I've read enough of this genre to make a pretty decent educated guess as to where the plot goes from here.
But more importantly - thank you for the chapter.